An oil burner equipped with the CAD cell relay will ignite, run for about ninety seconds, and cut off. What is the first thing the service technician should do?
What will be an ideal response?
Clean the surface of the CAD cell.
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Explain the difference between a "pictorial" diagram and a "schematic."
What will be an ideal response?
Associated with ____ applications are soldering, brazing, and braze welding.
A. shielded metal arc welding process B. gas metal arc welding process C. oxyfuel welding process D. gas tungsten arc welding process E. none of the above
Organizations that set safety standards for manufactured ductwork include:
A) AHRI and HVAC Excellence. B) Underwriters Laboratories and the National Fire Protection Association. C) EPA and OSHA. D) ACCA and RSES.
____ are energy-absorbing units located at the bottom of the hoistway that absorb any impact from a car that descends below the normal lowest level.
A. Hoists B. Ropes C. Buffers D. Cushions